Key holder



FIG. 1 is a front, right side, and top perspective view of a key holder showing my new design. A key and a portion of a key on a chain are shown in broken lines and are not part of the design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a left side elevation view thereof; and,

FIG. 7 is a rear elevation view thereof. 

The ornamental design for a key holder, as shown and described. 